利用无功/电压分区的多馈入直流落点选取方法  

Selection Method of Multi-infeed DC Landing Locations by Using Reactive Power/Voltage Partition

作　　者：史一明 梁卫东 张佳伟 阴敬磊 李强 SHI Yiming;LIANG Weidong;ZHANG Jiawei;YIN Jinglei;LI Qiang(School of Electrical Engineering,Northeast Dianli University,Jilin 132012,China;Weixian Power Supply Company,State Grid Hebei Electric Power Company,Xingtai 054700,China;Ningjin Power Supply Company,State Grid Hebei Electric Power Company,Xingtai 055550,China)

机构地区：[1]东北电力大学电气工程学院,吉林132012 [2]国网河北省电力公司威县供电分公司,邢台054700 [3]国网河北省电力公司宁晋县供电分公司,邢台055550

出　　处：《电力系统及其自动化学报》2017年第12期42-47,共6页Proceedings of the CSU-EPSA

基　　金：国家自然科学基金资助项目(51507028)

摘　　要：在多馈入直流系统中,合理安排直流线路落点有利于系统的安全稳定运行。基于无功与电压的强耦合特点,根据无功电压灵敏度指标对系统节点聚类,将各条直流线路落点到不同的子类中并形成落点方案集合,降低了直流落点间的电压交互作用;然后对方案进行综合评估,并与传统方法筛选结果比较;最后以IEEE14节点系统为例,筛选3条直流馈入时的最优落点方案。结果表明,使用无功电压灵敏度指标可以合理地进行系统分区。相比于传统方法,系统分区后可以尽可能多地剔除无竞争性方案,减少了计算规模,有助于实际工程应用,并且二者筛选最优方案一致。In a multi-infeed DC system,a reasonable arrangement of landing locations for DC lines is conducive to the safe and stable operation of the system.Based on the strong coupling features of reactive power and voltage,system nodes are clustered by using the sensitivity indexes of reactive power and voltage.In this way,each DC line can land in different sub-classes to relieve the voltage interaction of DC lines,and all landing schemes form a scheme set.Then,all landing schemes are evaluated comprehensively,and the results are compared with those obtained by using the traditional method.At last,an IEEE14-node system is taken as an example,and an optimal landing scheme with three infeed DC lines is selected.The result shows that it is reasonable to perform a system partition by using the sensitivity indexes of reactive power and voltage.Compared with the traditional method,the proposed method can efficiently eliminate the non-competitive schemes after system partition,which reduces the computation scale and is helpful to engineering applications.Moreover,the optimal schemes selected by two screening methods are consistent.

关 键 词：多馈入直流系统 无功电压灵敏度 聚类 交互影响 最优 

分 类 号：TM715[电气工程—电力系统及自动化]